You can't eat the same foods people ate 20 years ago. The cows aren't the same. The chickens aren't same. Cows and chickens today are more obese and eat more antibiotics than they used to be.
It's due to what we feed them, as well. We even feed corn to farmed Salmon, which makes their Omega 3&6 ratios the opposite of what they naturally are.
elktea|10 years ago